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Old 01-15-2004, 01:26 PM
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Servicing LE42 Chrysler Electronic 4 Speed Auto

I been doing some reading in a pretty good manual regarding this Intrepid of mine with nothing but a 2nd gear in forward. This is called "failsafe" or "Limp Home Mode".

Because I have the shift indicator LED's all lit when its in any gear, I been able to narrow down the problem to a small handful of things. Unfortunately the service shop I took the car to to have the transaxle scanned told me that it did not "throw" any codes, so it can't be diagnosed. They said there are a few Chrysler cars that can only be scanned by dealership scanners, but cost is a problem and trust is another.

But before I rip the valve body out, there are a couple simple things I heard that might also cause the problem.

1. I heard that if the battery voltage is too low, the transmission will go into "failsafe" 2nd gear operation. I don't have any real "symptoms" of a low battery or bad cell. Is there any way a battery can be bad without anything obvious. It starts OK all the time, but its an old battery, and the last guy that owned said it needed a charge to get it started.

2. There is a transmission relay of some kind under the hood in the "power distribution center" that can also cause the failsafe.

If its one of these, I could be running good in no time. Then there is the other things that it could be which are not all that expensive, but its so cold I can't tear the thing apart. And I don't want to lose pieces in the snow from the valve body or accumulators. So this is the other things I might have to do.

1. This thing has a "neutral safety switch", but its called either a Manual Valve Lever Position Sensor (MVLPS) or Transaxle Tange Sensor (TRS). You have to take the valve body off to replace this switch.

2. Then it could be the "Manual Valve" which is a valve that clips into the valve body. You also have to take the valve body off to replace this. Thing is, I can't seem to locate the part?

If any of you have experience with this LE42 or "A606" Chrysler transmission, please share some of your woes with me. This transaxle is used on all kinds of Dodges, Chryslers and Plymoths, and I even think its used on some Jeeps.



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Old 01-15-2004, 08:51 PM
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in a previous thread someone ask the same question,if all lights stay on when gear shift is moved the most common thing that will cause this is manual lever position switch . which is inside on valve body . tranny shop is you best bet here find the one in your area you feel comfortable with. never use 42 le in any jeeps... 42 RE rear drive tranny 46RE (45rfe) was near in design but still rear drive. most good tranny shops now can do good diagnosis on these cars we are just as good as any dealers with good tools
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Old 01-16-2004, 06:10 PM
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Having worked both places, tranny shops and dealerships, I would say go to tranny shop. Unfortunately, the people in the dealerships don't have the trans experience that they really should. They do everything, not just trannies.
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